forked from Minki/linux
abd4627475
Based on the normalized pattern:
this program is free software you can redistribute it and/or modify it
under the terms of the gnu general public license version 2 as
published by the free software foundation this program is distributed
as is without any warranty of any kind whether expressed or implied
without even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license version 2 for
more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
360 lines
8.1 KiB
C
360 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for TPS65218 Integrated power management chipsets
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps65218.h>
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#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
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static const struct mfd_cell tps65218_cells[] = {
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{
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.name = "tps65218-pwrbutton",
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.of_compatible = "ti,tps65218-pwrbutton",
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},
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{
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.name = "tps65218-gpio",
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.of_compatible = "ti,tps65218-gpio",
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},
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{ .name = "tps65218-regulator", },
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};
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/**
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* tps65218_reg_write: Write a single tps65218 register.
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*
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* @tps: Device to write to.
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* @reg: Register to write to.
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* @val: Value to write.
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* @level: Password protected level
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*/
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int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
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unsigned int val, unsigned int level)
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{
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int ret;
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unsigned int xor_reg_val;
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switch (level) {
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case TPS65218_PROTECT_NONE:
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return regmap_write(tps->regmap, reg, val);
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case TPS65218_PROTECT_L1:
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xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
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ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
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xor_reg_val);
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if (ret < 0)
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return ret;
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return regmap_write(tps->regmap, reg, val);
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default:
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return -EINVAL;
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}
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}
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EXPORT_SYMBOL_GPL(tps65218_reg_write);
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/**
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* tps65218_update_bits: Modify bits w.r.t mask, val and level.
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*
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* @tps: Device to write to.
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* @reg: Register to read-write to.
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* @mask: Mask.
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* @val: Value to write.
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* @level: Password protected level
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*/
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static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
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unsigned int mask, unsigned int val, unsigned int level)
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{
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int ret;
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unsigned int data;
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ret = regmap_read(tps->regmap, reg, &data);
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if (ret) {
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dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
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return ret;
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}
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data &= ~mask;
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data |= val & mask;
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mutex_lock(&tps->tps_lock);
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ret = tps65218_reg_write(tps, reg, data, level);
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if (ret)
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dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
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mutex_unlock(&tps->tps_lock);
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return ret;
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}
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int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
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unsigned int mask, unsigned int val, unsigned int level)
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{
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return tps65218_update_bits(tps, reg, mask, val, level);
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}
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EXPORT_SYMBOL_GPL(tps65218_set_bits);
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int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
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unsigned int mask, unsigned int level)
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{
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return tps65218_update_bits(tps, reg, mask, 0, level);
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}
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EXPORT_SYMBOL_GPL(tps65218_clear_bits);
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static const struct regmap_range tps65218_yes_ranges[] = {
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regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
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regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
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};
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static const struct regmap_access_table tps65218_volatile_table = {
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.yes_ranges = tps65218_yes_ranges,
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.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
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};
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static const struct regmap_config tps65218_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.cache_type = REGCACHE_RBTREE,
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.volatile_table = &tps65218_volatile_table,
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};
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static const struct regmap_irq tps65218_irqs[] = {
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/* INT1 IRQs */
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[TPS65218_PRGC_IRQ] = {
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.mask = TPS65218_INT1_PRGC,
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},
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[TPS65218_CC_AQC_IRQ] = {
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.mask = TPS65218_INT1_CC_AQC,
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},
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[TPS65218_HOT_IRQ] = {
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.mask = TPS65218_INT1_HOT,
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},
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[TPS65218_PB_IRQ] = {
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.mask = TPS65218_INT1_PB,
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},
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[TPS65218_AC_IRQ] = {
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.mask = TPS65218_INT1_AC,
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},
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[TPS65218_VPRG_IRQ] = {
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.mask = TPS65218_INT1_VPRG,
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},
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[TPS65218_INVALID1_IRQ] = {
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},
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[TPS65218_INVALID2_IRQ] = {
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},
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/* INT2 IRQs*/
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[TPS65218_LS1_I_IRQ] = {
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.mask = TPS65218_INT2_LS1_I,
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.reg_offset = 1,
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},
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[TPS65218_LS2_I_IRQ] = {
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.mask = TPS65218_INT2_LS2_I,
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.reg_offset = 1,
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},
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[TPS65218_LS3_I_IRQ] = {
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.mask = TPS65218_INT2_LS3_I,
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.reg_offset = 1,
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},
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[TPS65218_LS1_F_IRQ] = {
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.mask = TPS65218_INT2_LS1_F,
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.reg_offset = 1,
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},
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[TPS65218_LS2_F_IRQ] = {
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.mask = TPS65218_INT2_LS2_F,
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.reg_offset = 1,
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},
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[TPS65218_LS3_F_IRQ] = {
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.mask = TPS65218_INT2_LS3_F,
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.reg_offset = 1,
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},
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[TPS65218_INVALID3_IRQ] = {
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},
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[TPS65218_INVALID4_IRQ] = {
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},
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};
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static struct regmap_irq_chip tps65218_irq_chip = {
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.name = "tps65218",
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.irqs = tps65218_irqs,
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.num_irqs = ARRAY_SIZE(tps65218_irqs),
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.num_regs = 2,
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.mask_base = TPS65218_REG_INT_MASK1,
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.status_base = TPS65218_REG_INT1,
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};
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static const struct of_device_id of_tps65218_match_table[] = {
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{ .compatible = "ti,tps65218", },
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{}
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};
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MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
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static int tps65218_voltage_set_strict(struct tps65218 *tps)
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{
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u32 strict;
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if (of_property_read_u32(tps->dev->of_node,
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"ti,strict-supply-voltage-supervision",
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&strict))
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return 0;
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if (strict != 0 && strict != 1) {
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dev_err(tps->dev,
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"Invalid ti,strict-supply-voltage-supervision value\n");
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return -EINVAL;
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}
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tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
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TPS65218_CONFIG1_STRICT,
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strict ? TPS65218_CONFIG1_STRICT : 0,
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TPS65218_PROTECT_L1);
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return 0;
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}
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static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
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{
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u32 hyst;
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if (of_property_read_u32(tps->dev->of_node,
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"ti,under-voltage-hyst-microvolt", &hyst))
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return 0;
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if (hyst != 400000 && hyst != 200000) {
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dev_err(tps->dev,
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"Invalid ti,under-voltage-hyst-microvolt value\n");
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return -EINVAL;
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}
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tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
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TPS65218_CONFIG2_UVLOHYS,
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hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
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TPS65218_PROTECT_L1);
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return 0;
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}
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static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
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{
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u32 uvlo;
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int uvloval;
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if (of_property_read_u32(tps->dev->of_node,
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"ti,under-voltage-limit-microvolt", &uvlo))
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return 0;
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switch (uvlo) {
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case 2750000:
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uvloval = TPS65218_CONFIG1_UVLO_2750000;
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break;
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case 2950000:
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uvloval = TPS65218_CONFIG1_UVLO_2950000;
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break;
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case 3250000:
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uvloval = TPS65218_CONFIG1_UVLO_3250000;
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break;
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case 3350000:
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uvloval = TPS65218_CONFIG1_UVLO_3350000;
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break;
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default:
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dev_err(tps->dev,
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"Invalid ti,under-voltage-limit-microvolt value\n");
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return -EINVAL;
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}
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tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
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TPS65218_CONFIG1_UVLO_MASK, uvloval,
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TPS65218_PROTECT_L1);
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return 0;
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}
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static int tps65218_probe(struct i2c_client *client,
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const struct i2c_device_id *ids)
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{
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struct tps65218 *tps;
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int ret;
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unsigned int chipid;
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tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
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if (!tps)
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return -ENOMEM;
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i2c_set_clientdata(client, tps);
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tps->dev = &client->dev;
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tps->irq = client->irq;
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tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
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if (IS_ERR(tps->regmap)) {
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ret = PTR_ERR(tps->regmap);
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dev_err(tps->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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mutex_init(&tps->tps_lock);
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ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq,
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IRQF_ONESHOT, 0, &tps65218_irq_chip,
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&tps->irq_data);
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if (ret < 0)
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return ret;
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ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
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if (ret) {
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dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
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return ret;
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}
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tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
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ret = tps65218_voltage_set_strict(tps);
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if (ret)
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return ret;
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ret = tps65218_voltage_set_uvlo(tps);
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if (ret)
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return ret;
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ret = tps65218_voltage_set_uv_hyst(tps);
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if (ret)
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return ret;
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ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
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ARRAY_SIZE(tps65218_cells), NULL, 0,
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regmap_irq_get_domain(tps->irq_data));
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return ret;
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}
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static const struct i2c_device_id tps65218_id_table[] = {
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{ "tps65218", TPS65218 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
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static struct i2c_driver tps65218_driver = {
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.driver = {
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.name = "tps65218",
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.of_match_table = of_tps65218_match_table,
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},
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.probe = tps65218_probe,
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.id_table = tps65218_id_table,
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};
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module_i2c_driver(tps65218_driver);
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MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
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MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
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MODULE_LICENSE("GPL v2");
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